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Old 11-23-2011, 04:43 AM   #1
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hollow keel

I just bought a 1977 40' marine trader,* I noticed the previous owner removed the fiberglass cap to the keel about 75% of the length.** He than removed what ever was in there and now it is just hollow fiberglass.** What is recomended to fill in?** I heard of foam, cement, and just leaving it.* Any help would be great.**
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Old 11-23-2011, 10:57 AM   #2
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RE: hollow keel

My Albin's keel is filled with cement.

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Old 11-23-2011, 02:44 PM   #3
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RE: hollow keel

My marine trader is filled with what seems like grey stones and resin I believe that is balasted for a reason
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Old 11-23-2011, 04:33 PM   #4
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RE: hollow keel

ok,* did you do it or was it already there?** wondering if plain ole redimix would work or if it needs to be a special blend.
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Old 11-24-2011, 08:29 AM   #5
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RE: hollow keel

I believe the ballast was there fron the build The top is glassed over I am sure it adds stability in rough water
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Old 11-25-2011, 04:39 PM   #6
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RE: hollow keel

* My 77 40' sedans keel was hollow, I filled it with cement.
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Old 11-26-2011, 08:38 AM   #7
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RE: hollow keel

ok,* what type of cement?* redimix, with small rocks?**** also did you put a cap over the cement or just leave it raw cement?* thanks for you input.
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Old 11-28-2011, 03:48 PM   #8
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RE: hollow keel

* I used redimix, I used a 3 inch hole saw and cut several holes, through which I pored the mix, after it dried I placed the plug back in the hole and glassed over them. I let it dry for a couple of months.
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Old 11-28-2011, 04:48 PM   #9
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RE: hollow keel

great,* thanks,* I will try it this spring.
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Old 11-29-2011, 05:19 AM   #10
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RE: hollow keel

Might be worth keeping as it is a great sump.

Cement is only about 100 lbs a cubic foot , so it will take a huge amount to create "stability".

Lead is 700 or so , and even steel about 500.
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Old 11-29-2011, 05:37 AM   #11
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RE: hollow keel

Let me add that IF you decide to fill your keel with cement, consider first installing a good drain plug at the lowest place in the keel so you can drain the keel when it is on the hard.

I say this because I had to install a plug in my boat because when I bought it the keel had water in it (NOT found by the surveyor I might add). This was not an easy task with water already dripping out. Another Albin (36) owned by a friend was also full of water and he had to drain his as well.

In my case I believe the water entered the keel via non sealed screw holes that mounted the oem bilgepump. I sealed those holes and now finally the water is almost completely drained. Every fall I remove the plug and now only a few drops drain out. My friend's Albin took 3 years of winter draining to dry out. His root cause was several cracks in the fiberglass cover over the keel. He ground all the glass out and re glassed it.

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